:root {
  --bg: #ffffff;
  --fg: #1a1a1a;
  --muted: #5c5c5c;
  --link: #1d4ed8;
  --rule: #e5e5e5;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #111213;
    --fg: #ececec;
    --muted: #a0a0a0;
    --link: #8ab4ff;
    --rule: #2a2b2d;
  }
}
* { box-sizing: border-box; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font: 16px/1.6 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
}
main { max-width: 720px; margin: 0 auto; padding: 32px 16px 64px; }
h1 { font-size: 2rem; line-height: 1.2; margin: 0.5em 0 0.25em; }
h2 { font-size: 1.2rem; margin-top: 2em; padding-top: 1em; border-top: 1px solid var(--rule); }
a { color: var(--link); }
code { font-size: 0.9em; overflow-wrap: anywhere; }
.meta, footer { color: var(--muted); font-size: 0.9rem; }
footer { margin-top: 3em; padding-top: 1em; border-top: 1px solid var(--rule); }